I wonder if I screw up?
My set up I moved one unit from a station without turning it off. I have not downloaded the data yet, thinking that because I move from station to another without turning it off. The receiver does not know where it is. I never lost lock, and I did turn the unit off after getting to the next station. Can I still use the data?

Time Trim. Hopefully you have at least a close idea of the time you moved the unit. If I understand correctly V2.0 would allow you to "see" the data and allow you to trim to the epoch the point in time that you moved the unit. But as it has not been released, it's kind of irrelevent.

Shawn
SIT Texas

Thank you for your reply. I thought that might be the answer. I did note the time when I turned the unit off.
Next question Shawn, I purchased the kinematic equipment, I still have yet to use it, however, my question is does the HP use time to register the point id location ( for Coordinates) along with the description?

Dw,

Yes.

Jimbo

DW,

Been there, done that. Or I can say the employee did that. The time it was in the case in his toyota truck was found by downloading the file, and looking in the "time view".....the colored bar for that receiver and session was hatched from the time it lost lock. I bet your data will be the same.
Good time to learn the ropes of the right click on the time line (I think it is right click) and "trim after".

Dave,

I still struggle with time trim. The whole before/after thing beats me up nearly every time. There's gotta be a better format for trim. Hopefully in the future....

J.D.

J.D.

Rarely do I need to use the time trim, but if you keep a good field log sheet while you are watching the receiver and have accurate time on your watch, you can note at what time the occupation timer changed. Then, if you occupied the point longer than "theoretically" necessary, and you have trouble with the processing, you can refer to the sheet and start trimming back.
I'll agree, it is slightly confusing, only because we don't do it that often.
Good example of where I do need to trim data was just the other day. I had two points in a neighborhood that were not what I would term "wide open view", so in an attempt to get a little more heighth, I used a 4' section of range pole on the tribrach adapter to get the Locus on up there. The trick was to go ahead and set everything up, get the measure up, and then turning the receiver on and fixing the adapter into the tribrach....all before it started logging data. On a "hot" start you have to be pretty quick.
Now, when the observation is done, you have to take the thing down while it is still logging data. So I make a note on the observation log to "trim after" and that solves that one.
So in the end, it is a nifty feature.
Then the Locus processor checks me again, with the blunder detection. I had the parameters set to 1 to 2 meters as a valid antenna heighth. These setups were in excess of the 2 meters. Pretty slick.

Hope you are getting great results down there in Texas!
Modified By Dave Huff on 5/2/2001 at 11:49 PM

Hello DW,

You've gotten some great direction already on trimming datasets. If this does not correct the problem, please feel free to email me and we'll make arrangements to resolve any issues remaining.

Best Regards,
Linda Malcom
Ashtech Technical Support
lmalcom@magellangps.com

Dave,

I have no problem with knowing WHEN a time trim is necessary. My problems are with the software format of "after" and "before", and the way the "times" are displayed. I have used time trim on several occassions in an attempt to isolate noisy data. After finally remembering the right combination to the procedure, it is very helpful. I just don't think it's a very straightforward procedure. It could be greatly simplified by allowing one to use a slide bar for time trim, similar to the Mission Planning time bar - only with a bit more precision than 15 minute increments.

J.D.

everything in Texas is going well. by the way, Shawn asked how you're liking the Z-Extreme, and did you ever figure out the button on the top. also, I'm wondering if the brim actually does work like a choke ring antenna when flipped in the "up" position? lol

J.D. and Shawn,

The Z xtreme (HAT for those that missed it) is doing fine in static mode lately, but had a bit of trouble Tuesday with the kinematic mode. Twas in cutover timber, with no water on a warm day. Local clinic diagnosed me with dehydration and heat exhaustion.
After the nurse couldn't thump out the bubbles on the IV line, I declined the thing. I really think it was the jar of "goop"......mechanics hand cleaner...that was on the counter in the exam room that turned me off.
Static sessions indoors on Wednesday went fine. We used the Locus today. Will try flipping the brim next week. Stay tuned!

Dave,

Next time you need that I.V. let me know. I'll U.P.S. a couple pints of Stumpwater India Pale Ale.
Not sure if you're serious or not about the heat prostration, but it is a very timely subject. I have suffered that wonderful malady a couple of times in the last 30 years or so. Both times were late April or early May, just as the weather really starts to warm. I guess mine was probably due to the early heat and forgetting how to "pace" myself for it. One thing I learned from some ECA and American Red Cross courses (used to be fire/rescue/ambulance affiliated) was a mix for drinking water. For each gallon of water mix in about 1/8 tsp baking soda and 1/4 tsp salt. Keep it iced and it tastes pretty good. You'll find that it takes a lot less to quence thirst and cools you off really fast. This stuff is no magic remedy, but Red Cross did recommend it for heat prostration and heat exhaustion in the '70's. I started carrying it for drinking water during the 100°/80% humidity days, and found it made a lot of difference for me.

J.D.